I think I remember reading about some individuals who applied to howard/meharry with low RC scores and got in. Obviously not ideal though and a big gamble. Who knows though.
I would apply but also plan to it again and send in those scores. I'm sure its incredibly frustrating getting low scores on one or two subjects and being fine with everything else. I pushed back my exam almost 4 months just for QR alone. Everything was ready except for that. Had to relearn a subject I always had trouble with, had to get better with time, had to get better with nerves. Honestly, maybe one or two times in dental school has been as hard as that particular time in my life. So I sympathize with you, I really do.